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Abstract This paper is the fourth in a series of four papers aiming to describe the (almost integral) Chow ring of M ̄ 3 M₃, the moduli stack of stable curves of genus 3. In this paper, we finally compute the Chow ring of M ̄ 3 M₃ with Z 1 / 6 Z1/6 -coefficients.
Michele Pernice (Mon,) studied this question.